Thats just Nika but he behaves like that all the time, it isnt really a surprise. The whole Holgerson/bella plan is the same thing, he talked to Amber and Bella about it too.A lot of very good points! One of the cringiest scenes in this VN was the part in the bar before Bella date where MC explains to Joff why he doesn't tell Nami about the guy hitting on her. Suddenly he's all "I'm doing social experiment" and "I'm big brain behind the curtain, muahahahaha!" and all that crap. That was such a random scene that the first time I got to it I was just blinking and going "huh?" It served no purpose, came out of nowhere, was completely at odds with the entire game before it and with the character and didn't appear again, nor had any influence.
Nika isnt flawless and its kind of a hubris and overconfidence (william is similar) often thinking he's smarter than he really is or simply not having the whole picture. There are multiple times where we can read his thoughts, feels very smart, yet we know this is kinda dumb.
I mean .. look at the date in the restaurant with bella, it doesnt work out ..
But you arent supposed to read that and think "damn he's smart!" his ideas are often kinda crap.